4.1 – The OSI Model
4.2 – Configuration Management Documentation
4.3 – Evaluating the Network
4.4 – Network Monitoring
4.5 – Network Performance Optimization
4.6 – Network Troubleshooting Methodologies
4.7 – Troubleshooting Physical Connectivity Issues
4.7 – Troubleshooting Logical Connectivity Issues
4.7 – Identifying Issues for Escalation
4.7 – Troubleshooting Wireless Issues